Peroxide Forming List

A. Chemicals that form explosive levels of peroxides without concentration 

 

 

 Butadiene a 

 Isopropyl ether 

 Sodium amide (sodamide) 

 

 

 Chloroprene a 

 Potassium metal 

 Tetrafluoroethylene a 

 

 

 Divinylacetylene 

 Potassium amide 

 Vinylidene chloride 

 

 

   

 

 

  B. Chemicals that form explosive levels of peroxides on concentration 

 

 

 Acetal 

 Diethyl ether 

 4-Methyl-2-pentanol 

 

 

 Acetaldehyde 

 Diethylene glycol dimethyl 

 2-Pentanol 

 

 

 ether (diglyme) 

 

 

 Benzyl alcohol 

 Dioxanes 

 4-Penten-1-ol 

 

 

 2-Butanol 

 Ethylene glycol dimethyl 

 1-Phenylethanol 

 

 

 ether (glyme) 

 

 

 Cumene 

 4-Heptanol 

 2-Phenylethanol 

 

 

 2-Cyclohexen-1-ol 

 2-Hexanol 

 2-Propanol 

 

 

 Cyclohexene 

 Methylacetylene 

 Tetrahydrofuran 

 

 

 Decahydronaphthalene 

 3-Methyl-1-butanol 

 Tetrahydronaphthalene 

 

 

 Diacetylene 

 Methylcyclopentane 

 Vinyl ethers 

 

 

 Dicyclopentadiene 

 Methyl isobutyl ketone 

 Other secondary alcohols 

 

 

   

 

 

 C. Chemicals that may autopolymerize as a result of peroxide accumulation 

 

 

 Acrylic acid b 

 Methyl methacrylate b 

 Vinyl chloride 

 

 

 Acrylonitrile b 

 Styrene 

 Vinylpyridine 

 

 

 Butadiene c 

 Tetrafluoroethylene c 

 Vinyladiene chloride 

 

 

 Chloroprene c 

 Vinyl acetate 

   

 

 

 Chlorotrifluoroethylene 

 Vinylacetylene 

   

 

 

   

 

 

 D. Chemicals that may form peroxides but cannot clearly be placed in sections A-C 

 

 

 Acrolein 

 p-Chlorophenetole 

 4,5-Hexadien-2-yn-1-ol 

 

 

 Allyl ether d 

 Cyclooctene d 

 n-Hexyl ether 

 

 

 Allyl ethyl ether 

 Cyclopropyl methyl ether 

 o,p-Iodophenetole 

 

 

 Allyl phenyl ether 

 Diallyl ether d 

 Isoamyl benzyl ether d 

 

 

 p-(n-Amyloxy)benzoyl 

 p-Di-n-butoxybenzene 

 Isoamyl ether d 

 

 

 chloride 

 

 

 n-Amyl ether 

 1,2-Dibenzyloxyethane d 

 Isobutyl vinyl ether 

 

 

 Benzyl n-butyl ether d 

 p-Dibenzyloxybenzene d 

 Isophorone d 

 

 

 Benzyl ether d 

 1,2-Dichloroethyl ethyl 

 B-Isopropoxypropionitrile d 

 

 

 Ether 

 

 

 Benzyl ethyl ether d 

 2,4-Dichlorophenetole 

 Isopropyl 2,4,5-trichloro- 

 

 

 phenoxy- acetate 

 

 

 Benzyl methyl ether 

 Diethoxymethane d 

 Limonene 

 

 

 Benzyl 1-napthyl ether d 

 2,2-Diethoxypropane 

 1,5-p-Methadiene 

 

 

 1,2-Bis(2-chloroethoxy) 

 Diethyl ethoxymethylene- 

 Methyl p-(n-amyloxy)- 

 

 

 Ethane 

 Malonate 

 benzoate 

 

 

 Bis(2 ethoxyethyl)ether 

 Diethyl fumarate d 

 4-Methyl-2-pentanone 

 

 

 Bis(2-(methoxyethoxy)- 

 Diethyl acetal d 

 n-Methylphenetole 

 

 

 ethyl) ether 

 

 

 Bis(2-chloroethyl)ether 

 Diethyketene f 

 2-Methyltetrahydrofuran 

 

 

 Bis(2-ethoxyethyl)adipate 

 m,o,p-diethoxybenzene 

 3-Methoxy-1-butyl acetate 

 

 

 Bis(2-ethoxyethyl)phthalate 

 1,2-Diethoxyethane 

 2-Methoxyethanol 

 

 

 Bis(2-methoxyethyl)- 

 Dimethoxymethane d 

 3-Methoxyethyl acetate 

 

 

 Carbonate 

 

 

 Bis(2-methoxyethyl) ether 

 1,1-Dimethoxyethane d 

 2-Methoxyethyl vinyl ether 

 

 

 Bis(2-methoxyethyl) 

 Dimethylketene f 

 Methonxy-1,3,5,7-cyclo- 

 

 

 Phthalate 

 octa-tetraene 

 

 

 Bis(2-methoxymethyl) 

 3,3-Dimethoxypropene 

 B-Methoxypropionitrile 

 

 

 Adipate 

 

 

 Bis(2-n-butoxyethyl) 

 2,4-Dinitrophenetole 

 m-Nitrophenetole 

 

 

 Phthalate 

 

 

 Bis(2-phenoxyethyl) ether 

 1,3-Dioxepane d 

 1-Octene 

 

 

 Bis(4-chlorobutyl) ether 

 Di(1-propynyl)ether f 

 Oxybis(2-ethyl acetate) 

 

 

 Bis(chloromethyl) ether e 

 Di(2-propynyl)ether 

 Oxybis(2-ethyl benzoate) 

 

 

 2-Bromomethyl ethyl ether 

 Di-n-propoxymethane d 

 B,B-oxydipropionitrile 

 

 

 B-Bromophenetole 

 1,2-Epoxy-3-isopropoxy- 

 1-Pentene 

 

 

 propane d 

 

 

 o-Bromophenetole 

 1,2-Epoxy-3-phenoxy- 

 Phenoxyacetyl chloride 

 

 

 propane 

 

 

 p-Bromophenetole 

 p-Ethoxyacethophenone 

 a-Phenoxypropionyl chloride 

 

 

 3-Bromopropyl phenyl ether 

 2-Ethoxyethyl acetate 

 Phenyl o-propyl ether 

 

 

 1,3-Butadiyne 

 (2-Ethoxyethyl)-o-benzoyl 

 p-Phenylphenetone 

 

 

 benzoate 

 

 

 Buten-3-yne 

 1-(2-Ethoxyethoxy)ethyl 

 n-Propyl ether 

 

 

 acetate 

 

 

 tert-Butyl ethyl ether 

 1-Ethoxynaphthalene 

 n-Propyl isopropyl ether 

 

 

 tert-Butyl methyl ether 

 o,p-Ethoxyphenyl 

 Sodium 8,11,14-eicosa- 

 

 

 isocyanate 

 tetraenoate 

 

 

   

   

 

 

 n-Butyl phenyl ether 

 1-Ethoxy-2-propyne 

 Sodium ethoxyacetylide f 

 

 

 n-Butyl vinyl ether 

 3-Ethoxyopropionitrile 

 Tetrahydropyran 

 

 

 Chloroacetaldehyde 

 2-Ethylacrylaldehyde oxime 

 Triethylene glycol diacetate 

 

 

 diethylacetal d 

 

 

 2-Chlorobutadiene 

 2-Ethylbutanol 

 Triethylene glycol diprop- 

 

 

 ionate 

 

 

 1-(2-Chloroethoxy)-2- 

 Ethyl B-ethoxypropionate 

 1,3,3-Trimethoxypropene d 

 

 

 phen-oxyethane 

 

 

 Chloroethylene 

 2-Ethylhexanal 

 1,1,2,3-Tetrachloro-1,3- 

 

 

 butadiene 

 

 

 Chloromethyl methyl ether e 

 Ethyl vinyl ether 

 4-Vinyl cyclohexene 

 

 

 B-Chlorophenetole 

 Furan 

 Vinylene carbonate 

 

 

 o-Chlorophenetole 

 2,5-Hexadiyn-1-ol 

 Vinylidene chloride d 

 

 

   

 

 

 NOTES: 

 

 

 a 

 When stored as a liquid monomer. 

 

 

 b 

 Although these chemicals form peroxides, no explosions involving these 

 

 

 

 monomers have been reported. 

 

 

 c 

 When stored in liquid form, these chemicals form explosive levels of peroxides 

 

 

 

 without concentration. They may also be stored as a gas in gas cylinders. 

 

 

 

 When stored as a gas, these chemicals may autopolymerize as a result of 

 

 

 

 peroxide accumulation. 

 

 

 d 

 These chemicals easily form peroxides and should probably be considered 

 

 

 

 under Part B. 

 

 

 e 

 OSHA - regulated carcinogen. 

 

 

 f  

Extremely reactive and unstable compound.